https://repository.sustech.edu/handle/123456789/16800 2026-04-09T00:44:28Z https://repository.sustech.edu/handle/123456789/16809 Preparation and Evaluation of Ethoxylated Jatropha Oil Fatty Acids as Deemulsifier for Crude Oil Emulsion Taha,Haitham A.; Ahmed M. Al-Sabagh2; Elmugdad A. Ali1 Oil is produced from reservoirs in association with natural formation water or mixed formation during water injection. Removal of water is an essential step in petroleum refining for many technical reasons. Nonconventional homologous surfactants derived from natural oil such as Jatropha oil were synthesized to replace the commercial surfactants. The synthesis comprises two steps: first hydrolysis of the Jatropha oil followed by ethoxylation. The prepared ethoxylated Jatropha oil fatty acids exhibit high tendency toward de-emulsification of water in oil emulsion article 2016-01-01T00:00:00Z https://repository.sustech.edu/handle/123456789/16803 Synthesis of New 1,3,4-Thiadiazole Derivatives Based Hetrocyclics Salman,Amani Abdel Razig; Abdel Aziz, Ahmad M Farag A Facile route to some new 2-(3,5-diphenyl-1,3,4-thiadiazole-2-(3H)-ylidene) derivatives via the reaction of 3-mercapto-1-(1-methylbenzimidazole-2-yl)-3(phenylamino)-2(phenylsulfonyl)- propenone (3) with N-phenylbenzohydrazonyl chloride (4) is reported. Avariety of hydrazonoyl halides reacted with compound 3 affording 1,3,4-thiadiazole derivatives that incorporate a benzimidazole moiety article 2016-01-01T00:00:00Z https://repository.sustech.edu/handle/123456789/16807 Preparation and Evaluation of Ethoxylated Jatropha Oil Fatty Acids as Deemulsifier for Crude Oil Emulsion Haitham A Taha; Elmugdad Ahmed Ali Khalid Oil is produced from reservoirs in association with natural formation water or mixed formation during water injection. Removal of water is an essential step in petroleum refining for many technical reasons. Nonconventional homologous surfactants derived from natural oil such as Jatropha oil were synthesized to replace the commercial surfactants. The synthesis comprises two steps: first hydrolysis of the Jatropha oil followed by ethoxylation. The prepared ethoxylated Jatropha oil fatty acids exhibit high tendency toward de-emulsification of water in oil emulsion article 2016-01-01T00:00:00Z https://repository.sustech.edu/handle/123456789/16802 Elemental Analysis of Some Geophagic Soils of Hagar Sari Area Using Inductively Coupled Plasma Technique Adam,Mohammed,Esraa Omer; Kanno,Ibrahim Osman; Osman,Mohammed Elmubark Fifteen samples of soil lick were collected from HagarSari surroundings at Northern Darfur and analyzed for elemental composition. Inductively coupled plasma technique was used. The results show that the mean percentage mineral contents were as follow: Aluminum (1.968%), Iron (1.707%), Potassium (0.40%), Sodium (0.1679%), Calcium (0.1680%), Magnesium (8.6×10-2%), Manganese (0.24×10-2%),Bbarium (0.0117%), Vanadium (0.573×10-2%), Chromium (0.51×10-2%), Strontium (0.47×10-2%), Zinc (0.253×10-2%), Copper (0.132×10-2%),Lead (0.235×10-2%), andMolybdenum and Nickel showed significantly low concentrations (0.044×10-2%, 0.0435×10-2% respectively). Silver and Cobalt were not detected. Surprisingly, Aluminum and Iron were mostabundant instead of Sodium, Potassium, Calcium and Magnesium which are normally considered to be the essential animal attractants, because they normally showed higher concentration in the licked soil samples almost in all studies concerned with this field for so many years in different countries article 2016-01-01T00:00:00Z